云南边境地区近30年土地利用与覆盖变化研究

A Research into Land Use and Land Cover Change of Yunnan Boundary in the Past Thirties Years

利用1976年的MSS、1995年的TM、2004年的TM三个时期遥感影像数据对云南边境地区的土地覆盖动态变化进行监测。选取了土地变化幅度、单一动态度、绝对动态度、综合动态度、土地综合利用程度和马尔柯夫模型六个指标,利用RS、GIS信息技术和数理统计方法,对云南边境地区土地利用的时空变化特征进行了分析。结果表明:土地覆盖主要以林地和裸地为主;土地覆盖变化幅度最显著的是建设用地和农田,而主导变化类型为林地和裸地;土地覆盖变化的主要方向是由林地向裸地和农田转化。

The spatial-temporal characteristics of land use and land cover change in the boundary of Yunnan Province have been monitored by using MSS and TM data that were acquired in 1976, 1995 and 2004.Based on the spatial analysis techniques supported by Arc/Info software and other statistical methods, six indexes are chosen to analyze the spatial-temporal change characteristics of land use and cover, namely, scope of LUCC, single dynamic of LUCC, absolute dynamic of LUCC, comprehensive dynamic of LUCC, integrated land use degree ,conversion matrix.The result indicates that most of the surface features are forest and naked rock,and the second is farmland and waters,that two types of remarkable change happened,namely, construction land and farmland,the change of forestland and naked land being dominant in change types, and that the main change trend is that naked land and farmland were changed from forestland.